STIS spectroscopy of newborn massive stars in SMC N81 M. Heydari-Malayeri, M. R. Rosa, D. Schaerer, F. Martins and V. Charmandaris A&A, 381 3 (2002) 951-958 Published online: 15 January 2002 DOI: 10.1051/0004-6361:20011574